```Python class UnorderedList: def __init__(self): self.head = None ``` __str__方法的实现方式是:将链表中的节点从链首开始遍历,每个节点的数据成员(data)append进一个list,最后返回str(list)。 ```Python def __str__(self): print_list = [] current = self.head while current is not No...
有序和无序仅仅指节点所包含的数据成员的大小排列顺序,有序指各个节点按照节点数据成员的大小顺序排序,从大到小或从小到大。无序则可以任意排列。 链表节点实现 实现方式完全同单向无序列表,这里不再过多介绍,感兴趣的可以看Python实现单向无序链表(Singly linked list)关于节点的实现方式。 链表实现 链表的实现中,...
206. Reverse Linked List Reverse Linked List 链表转置,这里实在想不到一个指针的解法了,只能用两个指针,再加上head的帮忙,p指针记录的是每次的队头元素,q指针指向下一个要插入队头的元素。 # Definition for singly-linked list. # class ListNode(object): # def __init__(self, x): # self.val = ...
Python Code: classNode:# Singly linked nodedef__init__(self,data=None):self.data=data self.next=Noneclasssingly_linked_list:def__init__(self):# Createe an empty listself.tail=Noneself.head=Noneself.count=0defappend_item(self,data):#Append items on the listnode=Node(data)ifs...
# Definition for singly-linked list.# class ListNode:# def __init__(self, val=0, next=None):# self.val = val# self.next = nextclassSolution:defdeleteNodes(self,head:ListNode,m:int,n:int)->ListNode:ifhead==None:return(None)a=b=headi=0whilei<m-1anda.next!=Noneandb.next!=None:...
self.next=None # 初始设置下一节点为空classSingly_linked_list:"""Python实现单链表"""def__init__(self):self.__head=None # head设置为私有属性,禁止外部访问 defis_empty(self):"""判断链表是否为空"""returnself.__head is None deflength(self):"""返回链表长度"""cur=self.__head # cur游标...
class Singly_linked_list: """Python实现单链表""" def __init__(self): self.__head = None # head设置为私有属性,禁止外部访问 def is_empty(self): """判断链表是否为空""" return self.__head is None def length(self): """返回链表长度""" ...
# Definitionforsingly-linked list.#classListNode:# def__init__(self,x):# self.val=x # self.next=NoneclassSolution:defaddTwoNumbers(self,l1:ListNode,l2:ListNode)->ListNode: 先看注释部分,这是对单个 ListNode 类的一个定义,其中有 val 和 next 属性表示该节点的值和链表的下一个值。拿我们题目中...
# Definition for singly-linked list. # class ListNode: # def __init__(self, x): # self.val = x # self.next = None class Solution: def reverseList(self, head: ListNode) -> ListNode: pre = None cur = head while cur: temp = cur.next # 先用临时变量把原来cur.next位置存起来 ...
In terms of implementation, circular linked lists are very similar to singly linked list. The only difference is that you can define the starting point when you traverse the list: Python class CircularLinkedList: def __init__(self): self.head = None def traverse(self, starting_point=None)...